Please note that I do not know about the Stone and Trade evolving pokemon.

Grass to the left of Conductor City:Swablu/Altaria (Normal/Dragon and Flying)Tropuis (Grass and Flying)Aerodactyl (Rock and Flying)Pidgey/Pidgeotto/Pidgeot (Normal and Flying)Chinchou/Lanturn (Water and Electric)Taillow/Swellow (Normal and Flying)Porygon/Porygon 2/Porygon-Z (Normal)Pichu/Pikachu (Electric) (Not Raichu as far as I know)Mareep/Flaffy/Ampharos (Electric)Electabuzz (Electric)

Cave leading to the Rock CityZubat/Golbat/Crobat (Poison and Flying)Gligar (Ground and Flying)Spiritomb (Ghost and Dark)Nosepass (Rock)Pineco/Foretress (Bug then Bug/Steel)Machop/Machoke (Fighting) (Not sure about Machamp)Smeargle (Normal)Shellos/Gastrodon (Water and Ground)Bellsprout/Weepinbell (Grass and Poison) (Weepinbell evolves with Leaf Stone)Makuhita/Hariyama (Fighting)Gible/Gabite/Garchomp (Ground and Dragon)Cacnea/Cacturne (Grass then Grass and Dark)Geodude/Graveler (Rock and Ground)Skorupi/Drapion (Poison and Bug, then Poison and Dark)Ekans/Arbok (Poison)Rhyhorn/Rhydon (Rock and Ground)Aron/Lairon/Aggron (Steel and Rock)Pinsir (Bug)Larvitar/Pupitar/Tyranitar (Rock and Ground, then Tyranitar is Rock and Dark)Sabelye (Ghost and Dark)Cubone/Marowak (Ground)Paras/Parasect (Bug/Grass)Cranidos/Rampardos (Rock)Cherubi/Cherrim (Grass)Mankey/Primeape (Fighting)Nidoran/Nidorina or Nidorino (depending on color) [Poison]Solrock (Rock/Psychic)Sandshrew/Sandslash (Ground)Abra/Kadabra (Psychic)